If you're a designer who is just starting out then, you will want to get your work out there as soon as possible because building a portfolio can take a long time. I read a convincing tweet from Dann Petty a couple weeks ago where he argues that you want to put your work up on sites like Dribbble because it gets exposure and potentially work interest for your designs much much quicker.

Squarespace is what I went with when I put together my UX portfolio. Easy to use editor (that can be mildly frustrating at times) and a bunch of great starter templates to choose from. I recommend doing a google search for a discount coupon.

If you'd like to use Wordpress, Semplice is probably one of the best plugins out there. The editor is gorgeous, and it's very versatile so you can be sure your portfolio is unique to you and to your style.

TemplateToaster is a powerful theme generator, used for designing themes and templates for five major content management systems. WordPress, Joomla, Drupal, Magento, and Prestashop. Add to this, it is also used for creating Blogger templates.